Cosmetic changes to tests to make it easier to concatenate them.

test/cctest/compiler/test-linkage.cc

Index: test/cctest/compiler/test-linkage.cc
diff --git a/test/cctest/compiler/test-linkage.cc b/test/cctest/compiler/test-linkage.cc
index b903336c0cc089d21f4866c2bd127ad34c028710..300b4192682959264850015224faf15dbbff00b4 100644
--- a/test/cctest/compiler/test-linkage.cc
+++ b/test/cctest/compiler/test-linkage.cc
@@ -21,6 +21,8 @@
 
 #if V8_TURBOFAN_TARGET
 
+namespace test_linkage {
+
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
@@ -114,5 +116,6 @@ TEST(TestLinkageStubCall) {
   // TODO(titzer): test linkage creation for outgoing stub calls.
 }
 
+}  // namespace test_linkage
 
 #endif  // V8_TURBOFAN_TARGET